Low frequency vibrations of 1,2,3‐trichlorobenzene

The optically active low frequency vibrations of 1,2,3‐trichlorobenzene have been investigated. Unpolarized infrared and Raman spectra at room and liquid nitrogen temperature have been obtained, and the internal and lattice vibrations have been analyzed and compared with calculations based on the atom–atom model. The calculation method for the case of crystals containing two sets of symmetry unrelated molecules is discussed.